A Jin is one who typifies the Jain dharma ! Jin means Victor! conqueror!
The ultimate and absolute aim of life is salvation - Mukti! Deliverance!
Two powerful impediments to the attainment of salvation are attachment and
hatred. These two have been considered the inner enemies. They are the two
enemies that entangle the Soul (Atma) in the cycle of birth and rebirth.
Such passions as desire, anger, miserliness, arroggance and envy are but
the offspring or the manifestations of the two passions, namely,
attachment and hatred. One who attains an absolute victory over these
enemies is known as Jin. He is also known by other names.

These Jins have in their lives personally lived the
dharma and showed to the world the path of attainment and that has become
the dhama for Sadhakas, those who try to achieve it. The Jins give form to
it; and hence it is named Jin dharma.